Relationship Between IM and VP

[dental13]

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I know the fact that as inter-molecular increases it decreases the vapor pressure. Anyone can explain to me the concept here😕😕😕

 

[wall1two]

I know the fact that as inter-molecular increases it decreases the vapor pressure. Anyone can explain to me the concept here😕😕😕

think of intermolecular (inter is between objects not within them) forces as people holding hands in a pool. this pool has a volcano underneath it. as the volcano heats up you really want to get out of that pool, but if a lot of people in the pool are holding your hands really hard you cant get out of the pool. if you are in a pool with a bunch of toddlers they can't hold your hands very hard and you can break free and escape.

a bunch of body builders in a pool(strong hand holding) would be a low vapor pressure solution.

think of vapor pressure as the ease of getting out of the pool. high vapor pressure means you really want to get out of the pool (liquid to gas), and can do so due to poor hand holding (weak intermolecular forces)

low vapor pressure would be really strong hand holding, you want to get out (its hot and entropy yada yada) but strong hand holding (ionic attractions, dipole, h-bonding) are keeping you in the pool.

i hope this convoluted hand holding rant helped.

 

[dental13]

think of intermolecular (inter is between objects not within them) forces as people holding hands in a pool. this pool has a volcano underneath it. as the volcano heats up you really want to get out of that pool, but if a lot of people in the pool are holding your hands really hard you cant get out of the pool. if you are in a pool with a bunch of toddlers they can't hold your hands very hard and you can break free and escape.

a bunch of body builders in a pool(strong hand holding) would be a low vapor pressure solution.

think of vapor pressure as the ease of getting out of the pool. high vapor pressure means you really want to get out of the pool (liquid to gas), and can do so due to poor hand holding (weak intermolecular forces)

low vapor pressure would be really strong hand holding, you want to get out (its hot and entropy yada yada) but strong hand holding (ionic attractions, dipole, h-bonding) are keeping you in the pool.

i hope this convoluted hand holding rant helped.

Hay thank you for your answer. it's getting clear now. it's been a while it got be confused.

 

[MrFantastik]

hah this will forever be how i explain IMF and VP

does this analogy have another part for atmospheric pressure? one that helps explain that a liquid boils when VP = atmospheric P (or is it when VP >= atmospheric P? can VP be > atmospheric P?)

 

[wall1two]

hah this will forever be how i explain IMF and VP

does this analogy have another part for atmospheric pressure? one that helps explain that a liquid boils when VP = atmospheric P (or is it when VP >= atmospheric P? can VP be > atmospheric P?)

atmospheric pressure would be the people drinking rum and cokes on the deck around the pool.

say you are in a pool of just some normal people for now. fairly strong hand holding (mild IM forces) . and there is a fair amount of people around the pool hanging out ect (atmospheric pressure) .

now any pool that is wall to wall with people stinks to be in (entropy) and you want to get out and be able to drink cocktails with some elbow room on the deck (liquid vs gas. the gas has more entropy thus more desirable)

if the deck is really packed full of people(high atmospheric pressure) it will be really hard to get out of the pool(all the bros on the deck push you back in as you are decreasing their space /entropy).

now, if you are in the pool and there are just a few babes on the deck(low atmospheric pressure), you will be able to get out and you are gonna want to stay out of the pool and chat a bit.

now for boiling. when there is just the right amount of people on the deck, lets say 760 people 😉 people in the pool starting getting out , but the people on the deck start getting too cramped so they hop in the pool, and this equilibrium of in and out develops.

in sum. lot of people on the deck=high atmospheric pressure. and this pressure/people keep the people in the pool, in the pool. (well its not always the same people its an equilibrium thing in real life but for this example it works) a low atmospheric pressure means there is a better ability to get out of the pool.

now time for my daily math destroyer test before work

 

[invictusx]

I know the fact that as inter-molecular increases it decreases the vapor pressure. Anyone can explain to me the concept here😕😕😕

I like all what has been said above.

But for me, as intermolecular forces increase, you need more energy to break apart bonds in the solution before the molecule can be released as vapor. So, the vapor pressure is lower. So it takes a longer process for the molecule to be vapor since you'd require the breaking of bonds first.

 

[MrFantastik]

atmospheric pressure would be the people drinking rum and cokes on the deck around the pool.

now, if you are in the pool and there are just a few babes on the deck(low atmospheric pressure), you will be able to get out and you are gonna want to stay out of the pool and chat a bit.

lol thx...much better than the ideas i was making up in my head for atm P🙂